Clarence v



(No Model.)

0. V. GREENAMYER; PIVOTBD JAW WRENCH.

No. 444,777. Patented Jan. 13, 1891 WI'Tne55E5: v InUEnTnn CLARENCE V.GREENAMYER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE VERNER FRENCHCAR MOVER AND POIVER MANUFACTURING COMPANY, OF SAME PLACE.

PlVOTED-JAW WRENCH.

SPECIFICATION forming part of Letters Patent No. 444,777, dated January13, 1891.

Application filed August 7, 1890. den'al No. 361,374. (No model.)

To a whom it may concern:

Be it known that I, CLARENCE V. GREENA- MYER, a citizen of the UnitedStates, residing in the city and county of San Francisco,

5 State of California, have invented certain new and useful Improvementsin Adjustable \Vrenches, of which the following is a specification.

My invention relates to an improved wrench I or implement for grippingand turning screwrods, shafting, pipe-couplings, nuts, and similar work;and it has for its object to provide a simple and efficient implementthat will afford a firm grip upon the work, that has capacjty ofadjustment for different sizes of work, is readily applied, and will notcut or mar the surface which it grasps, and which can be made to grasp apipe upon either face of the double cam of the wrench and turn it ineither direction without c'han gin g the hook, but only by swinging thecam upon its pivot. These valuable features and qualities are secured bymeans of the construction herein described, and illustrated in theaccompany- 5 ing drawings.

Figure l of the drawings represents the implement applied to a pipecoupling for turning it in one direction, and Fig. 2 shows it in reverseposition for turning the piecein 3 the opposite direction. Figs. 3 and 4represent the parts separated.

In its general character and principle of operation this inventionfollows the implement heretofore invented by me, upon which LettersPatent of the United States No. 329,642 were granted and issued on the3d day of November, 1885; but it will be seen to ditfer from that devicein possessing certain features of adjustability, whereby it is 4 madecapable of properly seizing and firmly grasping pieces of work ofdiiferent sizes. It is therefore of much greater scope and use fulnessthan the patented device above mentioned, and is not restricted tospecific Work.

The novel point or feature of the present invention consists of a wrenchor implement having one jaw or part formed with double smooth curvedfaces and the other jaw or part of a swinging hook that is pivoted tothe double-face part at a point eccentric to :0 but equidistant fromboth faces, and is adjustable on said pivot to vary the space betweenthe said gripping parts-that is, the curved faces and the hook-theworkingedges or faces of the parts being finished smoothly.

A indicates the part with double curved faces a a regularlyconvergingand meeting together in a more or less acute point, and B the swingingook. The part A is fixed on the end of a handle of suitable length, oris formed in one piece with a handle. The faces C: o are smoothtoothless surfaces, which will grip the pipe without cutting or marringit.

C is a pivot by which the hook is attached to the other part. The hole Afor the pivot is located in the longitudinal center line of the part Aat a point which is eccentric to each curved face a, a and the shank Bof the hook is split to take over the part A and swing clear of thepoint, so that it may be brought into working position with either oneof the curved faces by simply swinging the cam in the hook and withoutchanging or shifting the hook, and the same adjustment will serve whengripping with either face upon the same-sized pipe, as both smoothrounded faces of the cam are equidistant from the pivot at any point ofadjustment, as will be evident from the fact that the holes 5 and A arein the center line of cam, han- 8o dle, and shank.

By varying the length of the hook-j aw from itspivot O outward the toolis adapted to properly seize and hold without slip pieces of differentsizes with considerable range of sizes, and for this purpose the shankof the hook is provided with a number of spaced pivot-holes 11 so thatby shifting the pin C from one hole in the shank to another the jaws arereadily set farther apart or closer together, as maybe required. This isa simple and ready mode of adjusting the hook part to the double-facepart of the tool. I do not confine myself to this particular mode ofchanging the length of the swinging hook, however, as the desiredadjustment could be provided for in various ways; but I employ the pinand spaced holes in the hook part as having the features of strength andsimplicity, which are the essential ones in a tool of this character.

As thus constructed my improved wrench has considerable scope andcapacity, and especially it will be found to have the advantages beforementioned, of affording a firm grip of the work and not defacing thesurfaces upon which it takes hold.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a pipewvrench, the combination of a handle portion provided with ahead having smooth toothless cam-gripping faces coa and a swinging hookpivoted on said head, Whereby a pipe is held Without being out or marredby the wrench, as set forth.

2. The combination of a handle portion having a double cam-faced head,wi th a swinging hook having a bifurcated shank adjustably pivoted tothe head, the pivot in all points of adjustment being equidistant fromthe cam-faces, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal.

CLARENCE V. GREENAlllYER. [L's] Witnesses:

EDWARD E. OSBORN, H. J. LANG.

